Improvement in the double seamer for working sheet metal



UNITED STATES PATENT OFFICE.

IMPROVEMENT IN THE DOUBLE SEAMER FOR WORKING SHEET METAL- Specification forming part of Letters Patent No. 4,364, dated January 23, 1846.

To a/ZZ whom it may concern.'

Beit known that I, JOSEPH V. HEWEs, of

the county of Putnam and State of Indiana, have invented and added certain new and useful Improvements to the Double Seaming- Machine used by Tinners, Sheet-Iron Workers, Snc., bythe aid of which improvements I am eiiabledto turn down and press against the side of a vessel into a perfect seam the iiange left around the bottoms of buckets', 85o., after the bottoms are soldered onto the same, of' which the following is a specification.

rIhe nature of my invention consistsin making a conical flange upon the outer edge of one of the seaming rollers, elongating the journals of the shaft of the same, so as to give play lengthwise in the boxes, and in attach` ing a spring to the said shaft-for the purpose of drawing the same inward, and pressing` the conical flange against the outer edge of the smooth roller connected with the same. The other parts of my seaming-machine are like the double seaming-machine in common use.

A A is the frame or jaws, in which the double seaming-rollers b and c and their shafts e and d are secured.

ff are cog-wheels connecting the shafts e and d.

g is a spring connected by the hookn to the movable boxes, in which the roller end of the ilanged roller-shaft works, for the purpose of raising the roller when the regulating-screw h is unscrewed.

7i is a regulating-screw, which presses down upon the movable boxes in 'which the flanged roller-shaft works, and regulates the distance between the flanged and smooth roller.

i is a cap at the end of the frame A, be tween which and the frame the cog-wheels ff are placed.

7c is the crank,attached to the flanged rollershaft e.

. m is a spiral spring surrounding the flanged roller-shaft e between the cap i and the crank k. When not in operation the spiral spring m draws in the flanged roller sufficient to bring the outer side of both rollers on a vertical line with each other. The bucket or vessel previously prepared for the operation of turning down and forming a seam of the projecting I flange surrounding the bottom of the same is now slipped on'over the smooth roller and shaft so far that the outer side of the smooth roller will press against the bottom of the vessel. The conical flange on the flanged roller is now slipped over the flange surrounding the bucket or vessel, and the regulating-screw his screwed down, turning the edge of the flange on the vessel inward and under, and pressing the same firmly against the side of the vessel between the smooth parts of the rollers. The crank lc is now turned until the seaming-rollers have passed entirely around the vessel,

Ythe conical side of the flange on the ilanged roller, by the aid of' the spring m and regulating-screw h, drawing in and turning down the edge of the flange surrounding the vessel, and the smooth part of both rollers pressing the same firmly against the side of the vessel,

making a perfectseam.

Having thus fully described my improved scathing-machine for turning down and forming a seam of the ange surrounding the bottoms of buckets, Src., what I claim therein as new, and desire to secure by Letters Patent,

The giving to one of the. double-seaining rollers a conical ange, in combination with a spring attached to the shaft of said roller in -such manner that the flange surrounding the bottom of avessel can be gradually bent down and the seam perfectly nished at one operation, the parts being constructed and combined substantially as herein set forth.y y

J. V.` HEWES.'

Witnesses:

A. MIDDLETON,

ROBERT N. BRADLEY. 

